Balun Burnups
K8DO at aol.com
K8DO at aol.com
Thu Sep 26 18:31:31 EDT 1996
In reference to bead baluns....
The ring (bead) of ferrite material chokes the current flowing down the
outside of the coax by acting like a shorted turn with high internal
resistance... (for the nit picky physicists out there, I know that this
isn't the _exact_ mechanism, but it is close enough and is understandable)...
the rings closest to the antenna terminals are exposed to the largest flux
field and have the largest circulating current inside of them, and are the
ones most likely to overheat and fail... the rings further down the choke
section are partially protected by the closer rings hogging the flux field
and are less likely to overheat...
For the usual HF bands, type 73 has more admittence and thus generates more
internal current/heat for a given flux level than type 43... a partial
solution would be to installl the first half dozen rings near the antenna
terminals using 43 mix, and the rest using 73 mix... the 43 mix would absorb
part of the flux without serious overheating, and the more "efficient" 73
mix would handle the mopping up of the rest of the external current...
Bead baluns are inefficient and prone to failure... I don't use them after a
couple of failures, and I would advise anyone asking me, to go to a wound,
toroidal current balun... 43 mix is my choice...
Denny k8do at aol.com
>From wz4f at nerak.companet.net (Larry A. Crim) Thu Sep 26 23:43:32 1996
From: wz4f at nerak.companet.net (Larry A. Crim) (Larry A. Crim)
Date: Thu, 26 Sep 1996 17:43:32 -0500 (CDT)
Subject: It only happens to other people.
Message-ID: <Pine.BSD/.3.91.960926173613.6760A-100000 at nerak.companet.net>
Jim,
Congratulations on a great idea! I'm WZ4F, and I'm in zone 4, not 5.
In the CQWW SSB write-up the past 2 years, I've been omitted from the
"Top Zones" boxes because CQ's software thinks I'm in zone 5. In
speaking with Bob Cox, he says there is nothing I can do to prevent this
because CQ's software uses CT's .bin file, which says nothing about my
location, nor anything about my sent exchange. Is there anyway that we
could coerce Kenny into incorporating this valuable info into the .bin files?
73,
Larry
WZ4F
On Wed, 25 Sep 1996, Jim Reisert AD1C wrote:
> On Tue, 24 Sep 1996 19:37:28 -0600, Mike Coolidge wrote:
>
> >That is because N7ML is in zone 4 not zone 3, same zone as me. Funny move
> >all the way from Illinois to Montana and Im still in the same zone!
>
> While I can't help the fact that ITU and CQ zones don't nicely follow
> call-area boundaries, or that the ARRL and CQ sometimes lose logs, or
> score them incorrectly, I can make life a little easier on the people who
> work you.
>
> If you are not in the CQ or ITU zone that CT thinks you should be in,
> please send me your contest callsign (i.e. I need to know if you sign
> /portable or not) and your actual CQ and/or ITU zone, so I can add you to
> CT's country file. This is especially if you are receiving a new callsign
> whose call area is not in the same CQ/ITU zone as your QTH.
>
> This will at least allow the lazy to log your zone properly, and will help
> when you are spotted on packet.
>
> 73 - Jim AD1C
>
> --
> Jim Reisert <AD1C at tiac.net> http://www.tiac.net/users/ad1c/
>
>
>
>From kg5u at hal-pc.org (Dale Martin) Fri Sep 27 00:43:26 1996
From: kg5u at hal-pc.org (Dale Martin) (Dale Martin)
Date: Thu, 26 Sep 1996 18:43:26 -0500
Subject: FW: ARLB066 International ops news
Message-ID: <01BBABDA.9D779260 at pm3-157.hal-pc.org>
I thought this would be of interest to the contest reflector and interesting diversion
from the callsign hoopla. Since many U.S. contesters are travelers to foreign
countries, this seemed particularly interesting and appropriate for the reflector.
73,
Dale
kg5u
OBS
----------
From: w1aw at arrl.org[SMTP:w1aw at arrl.org]
Sent: Thursday, September 26, 1996 16:50 PM
To: QST
Subject: ARLB066 International ops news
SB QST @ ARL $ARLB066
ARLB066 International ops news
ZCZC AG46
QST de W1AW
ARRL Bulletin 66 ARLB066
>From ARRL Headquarters
Newington CT September 26, 1996
To all radio amateurs
SB QST ARL ARLB066
ARLB066 International ops news
The FCC has proposed amending the Amateur Radio rules to make it
easier for hams holding a European Conference of Postal and
Telecommunications Administrations (CEPT) radio-amateur license or
an International Amateur Radio Permit (IARP) from certain countries
in Europe and the Americas to operate during short visits to the US.
If finally approved, hams would be able to operate for short periods
in participating countries without first obtaining another license
or permit from the host country.
The FCC says the arrangement is intended to make it easier for US
hams to operate stations temporarily in several countries in Europe
and Central and South America. Likewise, hams from those countries
would be allowed to operate in stations in places where the FCC
regulates ham radio. ''We believe that US participation in both the
CEPT agreement and the CITEL/Amateur Convention would benefit US
amateur operators who travel to Europe and to the Americas,'' the
FCC said in its discussion of WT Docket 96-188.
Operating authority by CEPT or IARP holders in the US would be for
''up to 180 days within the preceding five years.'' The two classes
of CEPT licenses would correspond either to Amateur Extra or
Technician class. Resident aliens or US citizens could not operate
in the US under a CEPT license or IARP.
Last year, ARRL petitioned the FCC to implement the CITEL/Amateur
Convention. The League also asked the Commission to acknowledge
arrangements to be made between the ARRL and the Department of State
to issue IARP documents to US citizens for use in other CITEL
countries. The FCC has asked the State Department to apply for
participation in the CEPT Agreement as a non-CEPT country and
expects the agreement to be concluded this year.
Comments on the proposal are due December 13, 1996 and reply
comments by January 13, 1997. E-mail comments should mention ''WT
Docket No 96-188'' on the subject line and should be addressed to
mdepont at fcc.gov. Include your full name and Postal Service
mailing address in the message text. Mail written comments to:
Office of the Secretary, Federal Communications Commission,
Washington, DC 20554.
NNNN
/EX
>From n6tv at VNET.IBM.COM ((415) 335-2265) Fri Sep 27 01:14:07 1996
From: n6tv at VNET.IBM.COM ((415) 335-2265) (415335-2265)
Date: Thu, 26 Sep 96 17:14:07 PDT
Subject: Offical 1996 Calif. QSO Party "Reserve Your County" List
Once again, the Northern California contest club is proud to sponsor the
California QSO Party, October 5-6th, 1996. We are working hard to get
all 58 California Counties on the air, but some may be a bit of a challenge.
Who will be the first one to work all 58?
Remember, the top 20 (that's right, twenty) finishers in and out of state
will receive a personalized bottle of genuine Napa Valley California Wine.
Plaques go to the top 3 in and out of state, plus certificates to first
place in each CA county, state, province, and country. CQP T-shirts are
also available. Exchange QSO # and State/Province/Country. California
stations send QSO number and county. More details are in CQ and QST.
Results of last year's CQP may be viewed at
http://ourworld.compuserve.com/homepages/n6ip/cqp.htm
The CQP is a great warmup for the Fall contest season. Work out all
those bugs before the big contests that follow soon after.
CQP is supported by CT, NA, and TRlog, plus free software from AE6Y and AD6E.
Here's the official "Reserve Your County List" as of 0020Z 27 SEP 96:
County Station(s)
--------------- ----------------------------------------------------
(mobile) AA4NC(also at WB6IRC), [NV6O,K6NP,WB6RVR], K0BGL/m
Alameda N6CCL
Alpine N6BT,WD6EKR
Amador AC6DQ,K6BPB(lim.),N6KD(+N6KI,N6AZE)
Butte KI6AN,KN6EL,AE0M(+N0BBS)
Calaveras N6TNX(+N6TNW), K6RK
Colusa [NV6O,K6NP,WB6RVR]
Contra Costa N6RO(K3EST,WM2C,W6EMS),K6MO/mm
Del Norte AA6DX,K6HY,AA6UN(lim.)
El Dorado WB6IRC(+W6OAT,AA6MC,AI6V,AA4NC),W6SUN
Fresno KG6F(lim.)
Glenn KM6RH,KQ6CN,[NV6O,K6NP,WB6RVR]
Humboldt W6JTI
Imperial KK6XN,N7CW/6,N6SMW,WA6FGV(lim.)
Inyo W6TVP(lim.),K0BGL/m,KM6TB?
Kern N6MU,KD6WPK,W8AKS(lim.),KM6TB?
Kings AA6GZ(lim.),N6UPU
Lake W6ESJ/m
Lassen K6JKC(lim.),KJ6MD(lim.)
Los Angeles KJ6HO,K6ZCL,WB6NFO,AC6CV,AB6FO,W6SD(K6QWH,KD6KKQ),KC6X,
N6GL,W6DDB(lim.),K6DMN
Madera N7STU,KD6FW(lim.)
Marin WA6CTA,W6ZQK(lim.),K6MO/mm
Mariposa KE6GTR(lim.),W6PYX,K6LRN
Mendocino KB6LZW
Merced KI6PR
Modoc K6RN,WB6IUU
Mono KM6OH(+NF6S,W6BSY,W6OA),WA6GDS(+NZ6N),N6PY
Monterey N6NM
Napa W6FSJ
Nevada WA6AUE
Orange N6HC
Placer K6SMH(+KE6QNJ),K6DGW,W6RFF
Plumas KG6VI,KF7AM
Riverside W6EEN
Sacramento KV6H,K6SG,K6FO(lim.),K6DR,W6NKR
San Benito WA6BWT(lim.),KB6INO(lim.)
San Bernardino KE6TLV(N7QQ),W6HAL,WA6FIT
San Diego W6MVW,KC6MIE,WA6YOO,WB6MSE
San Francisco W6BIP(N1EE)
San Joaquin KJ6DL,KD6WW(lim.)
San Luis Obispo W6KFV,W6MUS(lim.),W6TKF,WA6IET,AB6GY,KC6CEX,K6JG,WA6OET
San Mateo N6NF(lim.),W6ISO,KA6ING(lim.),KN6PW(+KB6LUC,NU6P,N6ZFT,KF6EIB)
Santa Barbara KC6CEX
Santa Clara N6TV,N6WLF(lim.),WA6HRK,KV6S(lim.)
Santa Cruz AB6EQ(+KD6NOS)
Shasta KG6LF,W6BJH(lim.)
Sierra WB6RXE
Siskiyou NI6T?,WA6OZZ(+N6EZN)
Solano WB6YRN,W6JSB(lim.),KD6DXA,WX6M,K6MO/mm
Sonoma WW6D(lim.),WA8LLY,KC6UUY(lim.),W6ESJ(lim.),K6MO/mm
Stanislaus WA6TKV
Sutter [NV6O,K6NP,WB6RVR]
Tehama K6AAW(lim.),W6JEX,KN6WY
Trinity N6IFW
Tulare KO6OP,WB6YIK(+KC6HJJ)
Tuolomne N6UUG(+WA6YVS),KI6PG(lim.)
Ventura K6VMN,AC6T
Yolo KE6DPV,[NV6O,K6NP,WB6RVR]
Yuba AE0M/6(+N0BBS)
73,
Bob, N6TV
1996 CQP County Coordinator
>From rlboyd at CapAccess.org (Rich L. Boyd) Fri Sep 27 02:03:28 1996
From: rlboyd at CapAccess.org (Rich L. Boyd) (Rich L. Boyd)
Date: Thu, 26 Sep 1996 21:03:28 -0400 (EDT)
Subject: SO v SOA v macho
Message-ID: <Pine.SUN.3.91-FP.960926210153.28095B-100000 at cap1.capaccess.org>
To me operating 45-48 hours out of 48 is macho no matter what category
you're in. And, scoring high in either SO or SOA is macho too, even
though these two categories are quite different from each other.
73 - Rich Boyd, KE3Q
>From nortonr at mrd.srl.dsto.defence.gov.au (Norton, Richard) Fri Sep 27 17:57:00 1996
From: nortonr at mrd.srl.dsto.defence.gov.au (Norton, Richard) (Norton, Richard)
Date: Fri, 27 Sep 96 10:57:00 CST
Subject: Multiple-Choice Packet-in-Contests Quiz
Message-ID: <324C2385 at msmail.dsto.defence.gov.au>
Hypothetical Situation:
Assume that you are connected with the judging of a large, popular,
international DX contest. Assume that in judging one of the modes of the
contest, some of the judges collectively spent over 100 man-hours looking at
a few single-operator logs to see if there was evidence of use of
packet-aided spotting.
Assume that the judges were experienced and competent at both contest
operating and log judging.
Assume that all those judges involved came to the same conclusion, which was
that a few single-operator entrants did use packet.
Assume that the judges also determined that there was no way they could
definitely prove that packet was used. Even things like two-character-errors
in copying a long callsign, that had just also been made by several other
multi-op members or assisted members of the operator's club, might just be
circumstantial.
Make no assumptions about what this would do, within the log-checking
community, to the reputations of those suspected of packet-use, even if they
happen to be innocent.
Assume that the feeling among the judges is that packet presents a means by
which some entrants easily CAN and HAVE cheated.
The question:
For this theoretical case, what should be done in the future, if anything?
Possible choices:
1) Do nothing. Out-foxing the committee and other contestants is part of the
contest. If these guys can do it, and the committee can't prove anything,
these guys deserve to win.
2) Do nothing. There is no need for a committee to judge logs. The entrants
should be trusted. Some bad apples will always be listed, but many of the
high scores will actually be real.
3) Do nothing. Let packet-cheaters be listed in the results the same way
that high-power cheaters are today. Their reputations can be handled in the
hallways of Dayton and Visalia.
4) Change the rules to allow packet spotting for single-operator
categories. Operator skills should be only important in the Sprint.
International DX contests should be primarily a measure of location and
station.
5) Permit the committee to make a decision based on a vote of the judges to
reclassify the log. Find more volunteers to perform these studies in every
contest.
6) Beef up the judging committee. Have referees at the stations during the
contest like was done at the WRTC. Find volunteers in all parts of the
country who know something about contests who want to spend their weekends
acting as referees.
7) Work strongly to minimize this problem by discouraging use of packet in
DX contests by anyone.
8) Work even more strongly to minimize this problem by making use of packet
in contests, by anyone, against the rules.
Dick Norton N6AA/VK5
NortonR at MRD.SRL.DSTO.DEFENCE.GOV.AU
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